D600 raw update for Photoshop CS6

I asked before, and a few people tried to help, and I really appreciate the suggestions. But for some reason I'm sorry to say the suggestions didn't work for me. It could just be me.

When I try to open a raw file from my D600, I get a message telling me Photoshop doesn't recognize the file, and it gives me an Adobe website to click on. When I did, there was an update ARC 7.4 something, so I downloaded that. This put an Icon on my home page. When I double clicked on it, it downloaded the update. I even got a message saying "completed the Adobe DNG converter 7.4 Setup Wizard, and has been installed on my computer".

I shut down and started the computer again and I still can't open RAW files.

NOTE: for some reason on my version of CS-6 I cannot go into the help on the top of the page and click on the "check for updates:, it doesn't do anything for some reason. Someone else put Photoshop on my computer so I don't know if they did something different or not.

I asked before, and a few people tried to help, and I really appreciate the suggestions. But for some reason I'm sorry to say the suggestions didn't work for me. It could just be me.

When I try to open a raw file from my D600, I get a message telling me Photoshop doesn't recognize the file, and it gives me an Adobe website to click on. When I did, there was an update ARC 7.4 something, so I downloaded that. This put an Icon on my home page. When I double clicked on it, it downloaded the update. I even got a message saying "completed the Adobe DNG converter 7.4 Setup Wizard, and has been installed on my computer".

I shut down and started the computer again and I still can't open RAW files.

NOTE: for some reason on my version of CS-6 I cannot go into the help on the top of the page and click on the "check for updates:, it doesn't do anything for some reason. Someone else put Photoshop on my computer so I don't know if they did something different or not.